BaldEagel

I have a Futaba R6014FS Rx and the siganl output voltage I am told is 2.7v is this compatable with Hitec digital servs?

Mike

MikeMayberry

My Feedback: (1)

Yes. However there were some older units that did not work, but the problem was fixed. So any new servos you purchase should work fine. If by chance you get some that don't then they would need to be sent to a Hitec service center to be modified (resistor.)

Mike.

BaldEagel

Mike

Very reassuring except I have been using Hitec servo for a number of years and have a lot of 5955's, 625's, 645's and 85MG's so how do I tell which ones will and which one's will eventually give a problem? or are you saying they will just not work with the low signal voltage if they are the old type?

Mike

MikeMayberry

My Feedback: (1)

Only a small percentage of the digtial servos did not work; analogs are fine. The only way to know is to plug them in. If you find some that don't work then send them in to be updated.

Mike.

BaldEagel

Thanks that is now clear.

Mike

Ehab

My Feedback: (44)

Has this been tested at higher temps? The reason I ask is because Futaba's advisory warns that some servos will work ok till the temps go up, then (I assume) the 6014 specifically may have a lower signal than 2.7v...

Just to let you know, I have been using hitec digi servos in my jets with the 6014 with no problems, BUT I am using a small 5v fan to keep the Rx cool...

Gatorb8

I'm very interested in this too.
Just got 6 7955TG servos and plan to use with 6014FS (which goes as low as 2.7V p-p square wave pulse on the servo signal line)
The general servo info sheet that came with the servo says
PULSE DATA
All Hitec servos require 3-5V peak to peak square wave pulse.

Is this literature (version 2) out of date or incorrect?
thx
Gator

MikeMayberry

My Feedback: (1)

The temp issue relates to the receiver only; that's a Futaba issue that I can't comment on.

The 3-5v info is out of date. All Hitec servos will operate on 2.7v peak to peak square wave pulse.

Mike.

tkilwein

On my HS5955TG's rev 1.04 and earlier, they have the resistor issue, my rev 7.x ones work fine.
My HS7955TG's rev 8.04 work fine.
The above is for my 6014, 617 RX's.

Gatorb8

Thanks!
That clears up one more mystery!
Gator

kmtranmd

My Feedback: (71)

Hi Mike,
Please comment on the post from Bill Baxter at the Futaba support forum:
"Some battery back-up devices might have difficulties with the lower operational voltages as well, although they might not appear to initially. One such device functions perfectly on the ground and during a range check, yet when the operational temperature reaches 50 degrees C (122 degrees F), the device actually requires 2.8 Volts in order to function properly. As such, the servos will cease to operate properly.

Many of the manufacturers are updating or refining their products to ensure compatibility with the lower operational voltages. Should you have any questions about the operation of such peripheral items we strongly suggest that you contact the manufacturer directly".
So if we're using the Futaba 6014 receiver during the summer, which Hitec digital servos have been known to fail due to lower voltage or high temperature?
I noticed that my newly bought 5645 will not run through a Y-connector, just chatter and not move, if using the 6014 rx. That is, I could not run a Y to 2 aileron servos, have to go with single dedicated chl for each servo instead. Have not tested this servo with high temperature test, but heard that someone on RCU crashed at 102F during summer due to servo lock out. And now I'm getting mixed messages about the source of the servo lock out problem. You're saying it's Rx source and Bax saying it's the servo being the source of the problem. I'm very confused...[]

tailspins

My Feedback: (7)

When this issue came up with Futaba and the 2.4 voltage ordeal I ordered some buffer amplifiers from ElectroDynamics and installed them in line with my older Hitec servos and I have not had any problem to date. I have been using the buffer amps for years with any servo that has a long extension anyway. ( cheep insurance policy )

http://www.electrodynam.com/rc/

As far as the heat issue witht the 6014 receiver is concerned, I just install two R608FS rcvrs when I need more than 8 channels in one model. When using the 14MZ any channel can be changed to perform any function that I want.

George C

A quick question:
I'm planning to use the r617fs reseiver with hitec 7955 servos on a quique 86" yak. Do I need pulse booster cables? The servos say that require 3-5V but I can't find any info about the receiver. Is the pulse voltage output the same as the 6014?

Thanks

George

BaldEagel

George C

Funny you should post that, I am using a R617FS in a 85" QQ Yak with 5955's all around, no boosters, no match boxes or any other fancy gear except for A123 batteries supplying the RX and Ignition, all with no porblems at all, if I understand these things correctly its only the 6014 that has the reduced signal voltage.

Hope this helps
Mike

tailspins

My Feedback: (7)

Thanks for the info Mike. George had a good question.
I will call Futaba today and ask Ben Baxter that same question. I believe in "over kill" since I lost a plane a few years ago because of aileron servos that had a signal problem.
I switch from 50 MHZ and 2.4 depending on what plane I am flying by changing the module on my 14 MZ. My older fleet is on 50 and the newer models are on 2.4
Just finished my 86 er yesterday and I am using a duralite 40/16 powerbox in it with 123 batteries all around using the R608FS rcvr and S9156 servos on the control surfaces

john

BaldEagel

john

I don't belive in "overkill", except that each servo is plugged into a seperate Rx socket, I do not use Y leads anywhere, the problem is on my Rookie with two way vectored thurst, I have thirteen inputs into the Rx without plugging in the batteries, so it looks like the batteries will be on a Y lead with the retracts and brakes.

Mike

tailspins

My Feedback: (7)

Muke

That is a bunch of inputs!
'I do not use "Y" adapters either.

What is a ROOKIE ? Not familuar with that model.

John

BaldEagel

John

Its made by Composite ARF, its a delta with Canard, four elevons, and two rudders, Pic below.

Mike

tailspins

My Feedback: (7)

WOW Mike...That is some model!

Up to 220 MPH (350 KHM ). Now that is a real "flash" I bet.

What are you using for the power plant? I would be very interested in seeing some pictures of this if and when you get time.

This plane gives a real meaning to the word FAST!

John

BaldEagel

John

We rearly should not hijack this thread with all this talk of turbines, do a search for "ARF NEW ROOKIE" or "NEW ROOKIE - PARROT SCHEME PHOTOS" in RC Jets on RCU and you possibly will find all you need to know.

Mike

tailspins

My Feedback: (7)

OK Mike......Just got excited!

BaldEagel

Nothing wrong with getting excited, except that at my age it very exhasting LOL.

Mike

tailspins

My Feedback: (7)

Mike

When you set your CG did you draw a string line from wing tip to wing tip and then mark the spot at the fuse? I "hang balance" my models so I always need a reference point at the fuse rather than at the wing tip.

This was my last winters project and how I set the CG.

George C

Thanks for the info guys.

What I forgot to mention is that I was planning to use an emcotec v cable for the elevators

http://shop.rc-electronic.com/e-vend...t=11&c=37&p=37

in order to get an extra free channel for smoke. However it would be nice to hear what futaba has to say about this. However, if a V-cable is going to create problems of its own I might as well forget about smoke

Furthermore I don't know if there are any differences between
the receivers sold in the US and the ones sold in Europe. I bought mine from inwoodmodels.co.uk

Thanks

George

tailspins

My Feedback: (7)

George,

I could not get ahold of Ben today but I will try again tomorrow. I will also ask him if all Futaba rcvrs are created equal. Check back tomorrow around this time

John